US5645691A - Extended nip press roll for a papermaking machine - Google Patents

Extended nip press roll for a papermaking machine Download PDF

Info

Publication number
US5645691A
US5645691A US08/425,818 US42581895A US5645691A US 5645691 A US5645691 A US 5645691A US 42581895 A US42581895 A US 42581895A US 5645691 A US5645691 A US 5645691A
Authority
US
United States
Prior art keywords
press
strip element
shoe
strip
roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/425,818
Other languages
English (en)
Inventor
Thomas Zuefle
Christian Schiel
Karl Steiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Sulzer Papiermaschinen GmbH
Original Assignee
Voith Sulzer Papiermaschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Assigned to VOITH SULZER PAPIERMASCHINEN GESELLSCHAFT MBH reassignment VOITH SULZER PAPIERMASCHINEN GESELLSCHAFT MBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STEINER, KARL, SCHIEL, CHRISTIAN, ZUEFLE, THOMAS
Application granted granted Critical
Publication of US5645691A publication Critical patent/US5645691A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/20—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using rotary pressing members, other than worms or screws, e.g. rollers, rings, discs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
    • F16C13/024—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle
    • F16C13/026—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle by fluid pressure

Definitions

  • the present invention relates to a roll for a papermaking machine having at least one strip element extending substantially in the axial direction of the roll, which is supported, substantially against radial forces, by a plurality of supporting elements.
  • a roll of this kind has been known from U.S. Pat. No. 4,584,059.
  • the known arrangement is a shoe press roll where a press blanket is guided on guide strips that are supported by spring elements on an inner stiff carrying body so as to ensure a non-bending behavior of the press blanket in the axial direction. It has been found to be a disadvantage of this design that configuring the inner carrying body as a stiff element requires much input and is, thus, expensive especially in the case of press rolls of great width.
  • its studs assume an inclined position so that the carrying body moves away from the back-up roll at its ends, too.
  • the object of the present invention to provide a roll for a papermaking machine where a predetermined profile of the bending curve of the strip element can be adjusted in response to a given outer load acting on the roll. Further, it is an object of the invention to guarantee a sufficient hydrodynamic lubrication wedge for all operating conditions of a shoe press roll, if possible.
  • the supporting elements of a roll of the afore-mentioned kind comprise adjusting means by means of which a predetermined profile of the bending curve of the strip element and, preferably, its vertical position related to a back-up roll can be adjusted in response to a given outer load.
  • the object of the invention is thus fully achieved since it is now possible, according to the invention, to adjust a bending curve of a strip element at desire, independently of the deflection of the roll itself or the deflection of a carrying body provided in the roll. If desired, the vertical position of the strip element relative to the back-up roll can also be adjusted at desire. This enables the roll to be made less stiff, and arbitrary bending curves to be adjusted in response to a given outer load acting on the roll.
  • the position of the guide element can be adapted in a suitable way in order to permit a press felt running about the shoe press roll to be optimally guided. At the same time it is ensured that a sufficient hydrodynamic lubrication wedge will at all times exist on the press shoe.
  • the strip element according to the invention can be used in a plurality of other applications where the point is to adjust a given deflection of the strip element. So, the strip element according to the invention may be used with advantage also in deflection adjusting rolls or suction rolls, in particular also in suction press rolls.
  • strip elements may be provided in one roll. And it is also possible to use one or more strip elements for sealing the transition between sectors of different pressures.
  • the roll according to the invention is configured as a press roll for a papermaking machine having a press nip formed between two press elements, with the strip element arranged outside that nip, the roll comprising an inner carrying body that is intended for taking up external forces and on which the supporting elements are supported.
  • This design relates to the before-mentioned U.S. Pat. 4,584,059 where the strip element is arranged in a press roll outside the pressing plane. While it is generally known in connection with deflection adjusting rolls (compare DE 4,123,115 corresponding to U.S. Pat. No. 5,338,279) to adjust a desired deflection of a press blanket by means of a hydraulic chamber, this feature relates exclusively to the area of the press nip as such in order to enable extraordinarily high line forces to be taken up in the nip in the case of deflection adjusting rolls of great width, without the need to make use of expensive bearings for rotatably seating the entire roll. Instead, only the roller shell is rotatably supported, and the main portion of the pressing force is directly and hydraulically supported by a stationary yoke.
  • At least one supporting element comprises hydraulic or pneumatic adjusting elements.
  • the bending curve of the strip element can be adjusted in a particularly simple way, it being especially easy to allow for different parameters via a corresponding hydraulic or pneumatic circuit, in order to adjust a desirable bending profile.
  • a supporting element comprises a one-direction fluid cylinder to which a return spring element is assigned.
  • the spring element may of course also be omitted, and instead a two-direction fluid cylinder may be used.
  • the supporting elements comprise spring elements having different spring constants that are tuned to a specific deflection of the roll under load, in order to adjust a predetermined profile of the bending curve of the strip element.
  • the system can be still further simplified as it is then possible to do without any controllable hydraulic and pneumatic elements. It is only necessary in this case to adapt the spring constants of the respective spring elements to the outer load in order to achieve a desired bending curve of the strip element under a given load.
  • this result can be achieved by the utilization of spring elements with identical spring constants to which pistons of different piston surfaces are assigned, that are driven by application of the same pressure.
  • At least one supporting element comprises a motor-driven servo-drive.
  • This feature provides the advantage that an especially sensitive adjustment of the desired bending curve can be achieved, for example by the use of a motor drive having a corresponding reduction ratio, maybe in combination with a threaded spindle of a correspondingly small pitch.
  • different factors of influence can be allowed for by the control of the motor-driven servo-drives, simply by selecting a suitable electric control system.
  • the adjusting means are connected with the carrying bodies by articulations.
  • the strip element is subdivided axially into a plurality of strip element sections connected one to the other via articulations.
  • the articulations between the different strip element sections may also be obtained in this case by reductions in cross-section in the form of grooves, or the like, so that the reduced bending resistance in the area of the reduced cross-section finally has the effect of an articulation.
  • the roll according to the invention is configured as a shoe press roll comprising a press shoe arranged for being hydraulically pressed against a back-up roll, with a press blanket being guided about the press shoe and revolving on a lubricant, then it is especially advantageous to arrange the strip element immediately before the nip, viewed in the direction of movement of the web.
  • the strip element may comprise means for removing excessive lubricant by suction.
  • the object of the invention is achieved by the fact that the strip element is fixed on the press shoe.
  • the strip element is arranged immediately before the press shoe, viewed in the direction of movement of the web.
  • the strip element is formed integrally with the press shoe.
  • the strip element may be configured in this case for example as an extension of the press shoe toward its infeed side, and a separation may be provided between the strip element and the press shoe, for example in the form of an undercut provided at the end of the strip element.
  • lubricant may be supplied via an axial or radial channel to the pocket so formed between the strip element and the press shoe, if this should be necessary.
  • FIG. 1 shows a diagrammatic, very simplified representation of a first embodiment of a roll according to the invention, in unloaded condition
  • FIG. 2 shows the embodiment according to FIG. 1, loaded by a line force P;
  • FIG. 3 shows a detail of a second embodiment of a roll according to the invention, designed as a shoe press roll, in the area of the nip;
  • FIG. 4 shows another design of a roll according to the invention, modified relative to the design shown in FIG. 3 insofar as the shoe press roll is arranged in upper position;
  • FIG. 5 shows another design according to the invention, slightly modified relative to the design according to FIG. 3;
  • FIG. 6 shows another modification of the design according to FIG. 5;
  • FIG. 7 shows another design of the strip element, consisting of separate articulated sections
  • FIG. 8 shows another modification of an adjusting element, for adjusting the strip element according to the invention.
  • FIG. 9 shows a cross-section through another roll designed as a suction roll
  • FIG. 10 shows a cross-section through a detail of another exemplary embodiment of the invention, designed as a deflection adjusting roll.
  • FIG. 11 shows a cross-sectional representation of a polygon-like arrangement of a plurality of strip elements about a carrying body that deflects under load.
  • FIGS. 1 and 2 a first embodiment of a roll according to the invention is generally indicated by reference numeral 10.
  • the roll comprises a stationary carrying body 28, whose two ends are designed as stationary journals 26 that are supported on their one end in a fixed bearing 24 and on their other end in a floating bearing 22.
  • a roller shell is mounted in rotating relationship (not shown).
  • a strip element 12 Arranged on the carrying body 28, in parallel to the roller shell, is a strip element 12 which is intended to remain in parallel alignment with the roll when the roll 10 is loaded by a line force in axial direction, but to assume a desired bending profile in certain given applications. Further, the height of the strip element 12 relative to the back-up roll is to be adjustable.
  • the strip element 12 is coupled with adjusting means--being indicated generally by reference numeral 14--via a plurality of supporting elements, that are fixed in position via articulations 20.
  • the adjusting means are configured as two-direction hydraulic cylinders that can be extended via a pressure line 17 or retracted via a pressure line 19.
  • the carrying body 28 suffers a certain deflection, as indicated diagrammatically in FIG. 2.
  • the pressure line 17 of the adjusting means 14 is supplied with a pressure P1 that acts on the adjusting means 14 so that the force resulting from a line force P is compensated by the counteracting force exerted by the adjusting means 14 and the strip element is not deflected so that the distance a between the strip element 12 and an axis 25 extending through the centers of the bearings 22, 24 remains constant.
  • FIGS. 1 to 2 illustrate the most common application for the alignment of the strip element 12 to a desired bending curve under load.
  • the strip element may be used for supporting a press blanket guided about the roll, for stripping off liquids, for extracting liquids or applying them uniformly over the width of the roll, and for sealing the transition between sectors of different pressures on the roll, for example in the case of a shoe press roll, a suction roll or a deflection adjusting roll.
  • FIG. 3 shows one embodiment of the roll according to the invention in the form of a shoe press roll, indicated generally by reference numeral 30.
  • the shoe press roll 30 comprises a press shoe 54 that is held on a supporting element 55 and can be urged against an upper back-up roll 31 by a hydraulic pressure prevailing in the pressure chamber 56 between the supporting element 55 and a lower shoe bed 57.
  • the pressure chamber 56 is shut off by means of a gasket 58.
  • a press blanket 45 guided over the press shoe 54 revolves in the conventional way about a stationary carrying body of the roll 30, being hydrodynamically lubricated by a lubricating film on its side facing the press shoe 54.
  • the press blanket 45 is sealed off for this purpose laterally in a manner known as such (compare DE 3,501,635, corresponding to U.S. Pat. No. 4,625,376).
  • a felt that runs through the press nip 47 formed between the press shoe 54 and the back-up roll 31 is indicated only diagrammatically by reference numeral 43, and is guided on a pulp web (not shown) from which water is to be extracted.
  • the pulp web thus moves together with the press blanket 45 and the felt 43 in the direction of movement 42 through the press nip 47.
  • a lubricating nip 59 forms on the infeed end of the press shoe 54, through which a lubricant enters the interspace formed between the press blanket 45 and the press shoe 54. If the press blanket 45 moves at a sufficiently high speed, this gives rise to the formation of a hydrodynamic lubricating wedge, starting at the lubricating nip 59 on the infeed side of the press shoe, so that the press blanket 45 revolves in the press nip 47 substantially free from friction, in spite of the high load exerted on the press blanket in the radial direction of the roll 30.
  • the press blanket 45 is subjected to high radial loads already before it enters the press nip 47, which loads are due in particular to the longitudinal tension in the felt 43 and the press blanket wrapping around the nose of the press shoe 54, then this may lead to the lubricating nip 59 becoming narrower and, in the extreme case, to the press blanket 45 being squeezed off on the infeed side of the press shoe 54 so that a sufficient hydrodynamic lubrication is no longer ensured. Such a case may occur especially when no felt guide roll can be arranged on the infeed side of the shoe press roll because of space restraints.
  • a strip element 32 is arranged immediately before the press shoe 54, in the direction of movement 42, whose surface 33 serves to guide the press blanket 45.
  • the strip element 32 extends in the axial direction of the roll 30 and is supported on the carrying body 48 of the roll by a plurality of supporting elements, that are provided with adjusting means and are indicated generally by reference numeral 34, and can be adapted to the load acting on the press blanket 45 in order to adjust a desired bending curve of the strip element 32 and, thus, to ensure an optimum hydrodynamic lubrication for the press blanket.
  • a plurality of hydraulically actuated piston rods 36 whose ends take the form of cylindrical rams 35, engage a longitudinal groove 37 provided in the strip element 32 in order to support the strip element 32 in the desired way.
  • FIG. 3 i.e. the cross-sectional representation of FIG. 3, of course only the one adjusting means 34 that lies in the sectional plane can be seen, together with the respective piston rod 36 and the hydraulic means.
  • the piston rod 36 extends through a cylindrical opening 53 and another cylindrical opening 38 in the carrying body 48.
  • a spring element 44 In the upper cylindrical opening 53, one can see between its upper end face and a flange 50 rigidly fixed on the piston rod 36, a spring element 44 through which the piston rod 36 is biased in downward direction.
  • the lower end of the piston rod 36 carries a cylindrical piston 51 which is in sealing contact with the wall of the lower cylindrical opening 38, via a gasket 52.
  • a sealed pressure chamber 39 is created in the lower area of the cylindrical hollow space 38, to which chamber pressure can be applied from a pressure source 41, via a pressure line 40, in order to urge the piston rod 36 in upward direction against the restoring force of the spring element 44.
  • the pressure in the pressure chamber 39 is preferably controlled in a manner to ensure that the strip element 32 will at all times adapt itself to the shape of the press shoe 54 and, thus, guarantee optimum guiding conditions for the press blanket 45 on the infeed side of the press shoe 54, so as to ensure satisfactory hydrodynamic lubrication.
  • the shape of the press shoe 54 and, thus, the profile of the strip element 32 depend on whether or not the back-up roll 31 deflects.
  • FIG. 4 a design of the roll according to the invention, slightly modified compared with that illustrated in FIG. 3, is indicated generally by reference numeral 60.
  • the roll 60 which in this case also takes the form of a shoe press roll, is in this case arranged on top of the back-up roll 31.
  • Any excessive lubricant 61 on the infeed side of the press shoe 54 can be additionally extracted through a connected suction line 66, via a suction opening 64 in the strip element 32a and a suction channel 62, 63 running through the piston rod 36a of the adjusting means 34a.
  • pressure may be applied to the pressure chamber 39a formed in the cylindrical hollow space 38a via a pressure line 68 in order to extend the piston 51, together with the piston rod 36a, against the force of the spring element 44, in order to support the strip element 32a.
  • FIG. 5 Another modification of a roll according to the invention is generally indicated by reference numeral 70 in FIG. 5.
  • the system consists of a shoe press roll with a press shoe 54 that can be hydraulically urged against a back-up roll 31 arranged on top.
  • a strip element 32b is arranged on the infeed side of the press shoe 54 and rigidly connected with the press shoe 54, namely by being fixed by means of screws 74 in threaded bores 72 of the supporting element 55a arranged beneath the press shoe 54.
  • This embodiment distinguishes itself by the fact that it is considerably simpler than the designs described before with reference to FIGS. 3 and 4, as in this case no hydraulic adjusting elements, and corresponding controls, are required. Given the fact that the strip element 32b is subjected to substantially the same deflection as the press shoe 54 itself, due to its rigid connection with the supporting element 55a, perfect guiding conditions are ensured for the press blanket 45 on the infeed side of the press shoe 54, without any additional adjusting elements, so that here, too, good hydrodynamic lubrication is achieved.
  • the strip element 32b may be provided with longitudinal grooves 71 extending in the direction of movement of the web along the strip element 32b on the surface 33b facing the back-up roll 31, in order to further improve the oil lubrication in this area.
  • the depth of the longitudinal grooves 71 is between 0.2 and 1 mm.
  • FIG. 6 A further modification of the roll 70 described in connection with FIG. 5 is illustrated in FIG. 6 and indicated generally by reference numeral 80.
  • the strip element 32c is in this case no longer configured as an independent strip element fixed on the press shoe, but is instead formed integrally with the press shoe 54c.
  • the strip element 32c forms an extension of the press shoe 54c in a direction opposite to the direction of movement 42 of the web.
  • the press blanket 45 is again guided over the strip element 32c, and the curved surface 33c of the strip element comprises an undercut 82 on the infeed side, in which the lubricating nip 59 between the press blanket 45 and the press shoe 54c can develop.
  • additional lubricant may be introduced into this undercut 82, via lateral or radial channels, in order to improve the hydrodynamic lubrication.
  • longitudinal grooves 71c can be provided in the strip element 32c for this purpose.
  • FIGS. 7 and 8 show further modifications of the invention.
  • the strip element 32d--viewed in the longitudinal direction-- is subdivided into a plurality of strip element sections 92, 93, the different strip element sections 92, 93 being produced by transverse grooves 94 in the strip element 32d.
  • Each of the strip elements 92, 93 is again supported by an adjusting element, indicated generally by reference numeral 34d, which is fixed in position via articulations 97, 98.
  • the adjusting elements 34d comprise spring elements 91 and 99, respectively, that can be compressed in cylinders 95 by pistons 96 engaging the cylinders.
  • Adjusting the bending curve of the strip element 32d to a given outer load is rendered possible by suitable selection of the spring constants C 1 , C 2 of the different adjusting means 34d.
  • the strip element 32e is supported via adjusting means 34e comprising a motor-driven servo-drive, for which purpose a threaded spindle 104 adapted for being adjusted within a threaded bore 106, can be driven by an electric motor 102.
  • adjusting means 34e comprising a motor-driven servo-drive, for which purpose a threaded spindle 104 adapted for being adjusted within a threaded bore 106, can be driven by an electric motor 102.
  • FIG. 9 Another design of a roll according to the invention, in the form of a suction roll, is shown in FIG. 9 and indicated generally by reference numeral 110.
  • the shell 111 of the roll 100 is passed by suction openings 112 (illustrated only in the upper area, i.e. the area facing the back-up roll 31).
  • a suction zone 114 is sealed against the inner surface 118 of the shell 111 in the area of the press nip 47 by means of two strip elements 32f, each supported against the shell 111 via a plurality of adjusting means 34f, that are arranged one axially opposite to the other and one behind the other at the edges of the strip element 32f and that are supported on an inner, tubular carrying body 48f.
  • the adjusting means 34f are designed as double-acting hydraulic cylinders or as one-direction hydraulic cylinders provided with restoring spring elements (not shown). Exhausting can be effected in the area of the suction zone 114.
  • FIG. 10 Another embodiment of the roll according to the invention in the form of a deflection adjusting roll is illustrated in FIG. 10 and indicated generally be reference numeral 120.
  • a stationary carrying body 48g is provided in a rotatably supported roller shell 122. Between the shell 122 and the carrying body 48g a pressure chamber 144 is formed which is connected to a hydraulic pressure source (not shown) for pressing the shell against an opposing press shoe of a shoe press roll (not shown). Seated in the carrying body 48g is a supporting element 124 that can be moved in vertical direction. The pressure chamber 144 is sealed off relative to the carrying body 48g by elastic seals 126. Further seals are provided at the end faces between the carrying body 48g and the supporting element 124. There are provided two strip elements 32g arranged according to the invention on both sides of the supporting element, each comprising pairs of mutually parallel sealing strips, between which hydrostatic pockets 128, being supplied with a pressure agent, are formed on the roller shell 122.
  • the strip elements 32g are provided for this purpose on their radially inward face with longitudinal grooves 127 that are engaged by the piston rods 36g of the adjusting means 34g.
  • the piston rods are urged in radially inward direction by means of spring elements 44g retained between end faces of a cylindrical hollow space 38g formed by the pressing shoe 124, and of a piston 138 arranged on the piston rod 36g, respectively.
  • pressure chambers are formed between the pistons 138 and the lower end of the hollow spaces 38g, to which pressure can be applied via pressure lines 142 for urging the strip elements 32g in radially outward direction, toward the roller shell 122.
  • Hydrostatic pockets 128 can receive a pressure agent via passage channels 136 in the piston rods 36g, from passages 140 through which the pressure agent can flow from the pressure chamber 130 formed between the pressing shoe 124 and the carrying body 48g into the hydrostatic pockets 128 and into the area between the strip elements 32g, up to the roller shell 122.
  • FIG. 11 shows a roll, indicated generally by reference numeral 150, comprising a press blanket 168 revolving about polygonally arranged strip elements 152, 152a--n and a press shoe 154.
  • Those strip elements 152, 152a, 152e, 152f, 152g, 152h, 152i, 152m, 152n which are subjected to heavy radial deflection when the carrying body 166 deflects in the direction of the line force P, can be adjusted in position by adjusting means 174.
  • the strip elements 152b, 152c, 152d, 152g, 152j, 1521 are rigidly connected with the carrying body 166.
  • One strip element 152k can be displaced in horizontal direction for the purpose of forming a second press nip 172, in which however lower pressures are encountered than at the press shoe 154, which latter is designed for high pressures. Similar to the press shoe 154, that can be urged against the back-up roll via a pressure chamber 156 to which pressure is applied from a hydraulic line 158, the strip element 152k can be hydraulically urged against a back-up roll or a tensioned web (not shown) by means of the pressure generated in a pressure chamber 160 via a hydraulic line 162. It is not necessary to provide separate adjusting means for each strip element. For example, the strip elements 152a and e may be coupled via a connection rod 164 so that one of the two adjusting means can be omitted.
  • FIG. 11 shows the press blanket 168 in unloaded condition. Under load, polygon-like sections of the press blanket 168 will be obtained, especially when slippage occurs between the press blanket and a back-up roll.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Paper (AREA)
US08/425,818 1994-05-04 1995-04-20 Extended nip press roll for a papermaking machine Expired - Fee Related US5645691A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4415645.6 1994-05-04
DE4415645A DE4415645A1 (de) 1994-05-04 1994-05-04 Walze für eine Papiermaschine

Publications (1)

Publication Number Publication Date
US5645691A true US5645691A (en) 1997-07-08

Family

ID=6517221

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/425,818 Expired - Fee Related US5645691A (en) 1994-05-04 1995-04-20 Extended nip press roll for a papermaking machine

Country Status (9)

Country Link
US (1) US5645691A (fi)
EP (2) EP0685660A1 (fi)
JP (1) JPH0813374A (fi)
KR (1) KR950033140A (fi)
CN (1) CN1115832A (fi)
BR (1) BR9501648A (fi)
CA (1) CA2147730A1 (fi)
DE (1) DE4415645A1 (fi)
FI (1) FI952138A (fi)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5935385A (en) * 1996-04-19 1999-08-10 Voith Sulzer Papiermaschinen Gmbh Press device with oil aspiration device
US5980693A (en) * 1998-03-26 1999-11-09 Beloit Technologies, Inc. Extended nip press apparatus
US5997695A (en) * 1997-10-14 1999-12-07 Valmet Corporation Extended nip press
WO2000070143A1 (en) * 1999-05-14 2000-11-23 Metso Paper, Inc. Method and arrangement for an extended-nip roll, in particular for a press shoe roll of a shoe calender
US6248210B1 (en) 1998-11-13 2001-06-19 Fort James Corporation Method for maximizing water removal in a press nip
US6355143B1 (en) * 1999-11-26 2002-03-12 Valmet-Karlstad Ab Method and device for oil evacuation from a shoe press unit
US6402890B1 (en) * 1999-12-08 2002-06-11 Metso Paper Karlstad Ab Method and device for oil evacuation from a shoe press unit
WO2002079570A1 (en) * 2001-04-02 2002-10-10 Metso Paper, Inc. Shoe roll
WO2005116333A1 (en) * 2004-05-26 2005-12-08 Metso Paper Karlstad Ab Press, method in a press and press element for a press
KR100971243B1 (ko) 2003-07-10 2010-07-20 주식회사 포스코 코팅 폭 조정 기능을 갖는 강판 코팅롤

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19638689A1 (de) * 1996-09-20 1998-03-26 Voith Sulzer Papiermasch Gmbh Preßvorrichtung zur Behandlung einer Matrialbahn
JP3875898B2 (ja) * 2002-02-06 2007-01-31 イチカワ株式会社 抄紙機のシュープレス装置
DE102009028039A1 (de) 2009-07-27 2011-02-03 Voith Patent Gmbh Walze und Verwendung einer Walze und Verfahren mit einer Walze zur Behandlung einer Papier- oder Kartonbahn
FI126727B (fi) * 2012-10-19 2017-04-28 Valmet Technologies Inc Kenkätela, pitkänippipuristin ja kuiturainakone
SE538098C2 (sv) 2013-11-14 2016-03-01 Valmet Aktiebolag En långnypsvals med ett stödelement för behandling av en fiberbana
CN108179585B (zh) * 2018-03-05 2024-05-28 博路威机械江苏有限公司 Y形双压区挠度可控辊
CN108504673B (zh) * 2018-04-12 2020-08-18 兰州理工大学 一种转化质粒的方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2759035A1 (de) * 1977-12-20 1979-06-21 Escher Wyss Ag Hydraulisches stuetzelement
DE3311998A1 (de) * 1983-04-02 1984-10-04 J.M. Voith Gmbh, 7920 Heidenheim Bandpresseinheit, vorzugsweise als nasspresse einer papiermaschine
US4563245A (en) * 1983-05-13 1986-01-07 J. M. Voith Gmbh Press device, particularly for the removing of water from a web of paper
DE3501635A1 (de) * 1985-01-19 1986-07-24 J.M. Voith Gmbh, 7920 Heidenheim Presswalze
GB2182367A (en) * 1985-10-30 1987-05-13 Escher Wyss Gmbh Extended nip press
US4673461A (en) * 1985-11-25 1987-06-16 Beloit Corporation Enclosed shoe press with flexible end connections for its annular belt
US4923570A (en) * 1988-03-12 1990-05-08 J. M. Voith Gmbh Long nip press roll arrangement
DE4123115A1 (de) * 1991-07-12 1993-01-14 Voith Gmbh J M Hydrostatisch gestuetzte durchbiegungsausgleichswalze, insbesondere fuer papiermaschinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2942002C2 (de) * 1979-10-17 1982-06-16 Kleinewefers Gmbh, 4150 Krefeld Druckbehandlungswalze
DE3124616C2 (de) * 1981-06-17 1983-10-06 Escher Wyss Ag, Zuerich Walzenanordnung mit einer Durchbiegungseinstellwalze
DE3528333A1 (de) * 1985-08-07 1987-02-19 Kuesters Eduard Walze
DE4133562A1 (de) * 1991-10-10 1993-04-22 Voith Gmbh J M Walze mit biegungsausgleich

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2759035A1 (de) * 1977-12-20 1979-06-21 Escher Wyss Ag Hydraulisches stuetzelement
US4228571A (en) * 1977-12-20 1980-10-21 Escher Wyss Aktiengesellschaft Hydraulic support element
DE3311998A1 (de) * 1983-04-02 1984-10-04 J.M. Voith Gmbh, 7920 Heidenheim Bandpresseinheit, vorzugsweise als nasspresse einer papiermaschine
US4584059A (en) * 1983-04-02 1986-04-22 J. M. Voith Gmbh Belt press unit, preferably as wet press of a paper machine
US4563245A (en) * 1983-05-13 1986-01-07 J. M. Voith Gmbh Press device, particularly for the removing of water from a web of paper
US4625376A (en) * 1985-01-19 1986-12-02 J. M. Voith Gmbh Press roll for web material with clamped press jacket
DE3501635A1 (de) * 1985-01-19 1986-07-24 J.M. Voith Gmbh, 7920 Heidenheim Presswalze
USRE33034E (en) * 1985-01-19 1989-08-29 J. M. Voith Gmbh Press roll for web material with clamped press jacket
GB2182367A (en) * 1985-10-30 1987-05-13 Escher Wyss Gmbh Extended nip press
US4673461A (en) * 1985-11-25 1987-06-16 Beloit Corporation Enclosed shoe press with flexible end connections for its annular belt
US4923570A (en) * 1988-03-12 1990-05-08 J. M. Voith Gmbh Long nip press roll arrangement
DE4123115A1 (de) * 1991-07-12 1993-01-14 Voith Gmbh J M Hydrostatisch gestuetzte durchbiegungsausgleichswalze, insbesondere fuer papiermaschinen
US5338279A (en) * 1991-07-12 1994-08-16 J. M. Voith Gmbh Hydrostatically supported sag-compensation roll, in particular for paper manufacturing machines

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5935385A (en) * 1996-04-19 1999-08-10 Voith Sulzer Papiermaschinen Gmbh Press device with oil aspiration device
US5997695A (en) * 1997-10-14 1999-12-07 Valmet Corporation Extended nip press
US5980693A (en) * 1998-03-26 1999-11-09 Beloit Technologies, Inc. Extended nip press apparatus
US6458248B1 (en) 1998-11-13 2002-10-01 Fort James Corporation Apparatus for maximizing water removal in a press nip
US6669821B2 (en) 1998-11-13 2003-12-30 Fort James Corporation Apparatus for maximizing water removal in a press nip
US6387217B1 (en) 1998-11-13 2002-05-14 Fort James Corporation Apparatus for maximizing water removal in a press nip
US6248210B1 (en) 1998-11-13 2001-06-19 Fort James Corporation Method for maximizing water removal in a press nip
US7754049B2 (en) 1998-11-13 2010-07-13 Georgia-Pacific Consumer Products Lp Method for maximizing water removal in a press nip
US6517672B2 (en) 1998-11-13 2003-02-11 Fort James Corporation Method for maximizing water removal in a press nip
WO2000070143A1 (en) * 1999-05-14 2000-11-23 Metso Paper, Inc. Method and arrangement for an extended-nip roll, in particular for a press shoe roll of a shoe calender
US6355143B1 (en) * 1999-11-26 2002-03-12 Valmet-Karlstad Ab Method and device for oil evacuation from a shoe press unit
US6402890B1 (en) * 1999-12-08 2002-06-11 Metso Paper Karlstad Ab Method and device for oil evacuation from a shoe press unit
US20040079508A1 (en) * 2001-04-02 2004-04-29 Risto Turunen Shoe roll
US7172680B2 (en) 2001-04-02 2007-02-06 Metso Paper, Inc. Shoe roll
WO2002079570A1 (en) * 2001-04-02 2002-10-10 Metso Paper, Inc. Shoe roll
KR100971243B1 (ko) 2003-07-10 2010-07-20 주식회사 포스코 코팅 폭 조정 기능을 갖는 강판 코팅롤
WO2005116333A1 (en) * 2004-05-26 2005-12-08 Metso Paper Karlstad Ab Press, method in a press and press element for a press
US20080283208A1 (en) * 2004-05-26 2008-11-20 Metso Paper, Inc. Press, Method in a Press and Press Element for a Press
US7887675B2 (en) * 2004-05-26 2011-02-15 Metso Paper, Inc. Press, method in a press and press element for a press

Also Published As

Publication number Publication date
CN1115832A (zh) 1996-01-31
DE4415645A1 (de) 1995-11-09
BR9501648A (pt) 1995-11-28
JPH0813374A (ja) 1996-01-16
EP0795643A1 (de) 1997-09-17
FI952138A0 (fi) 1995-05-04
KR950033140A (ko) 1995-12-22
CA2147730A1 (en) 1995-11-05
EP0685660A1 (de) 1995-12-06
FI952138A (fi) 1995-11-05

Similar Documents

Publication Publication Date Title
US5645691A (en) Extended nip press roll for a papermaking machine
US4287021A (en) Extended nip press
US4705602A (en) Hydraulic pressing shoe with an adjustable circumferential press zone
US5223100A (en) Press shoe for extended nip press for dewatering a fiber web
JP2529652Y2 (ja) 可変クラウン・ロール
EP0332594B1 (en) Variable-crown roll
KR960015899B1 (ko) 자기 부하 제어 편향 로울
GB2125117A (en) Hydrostatic support elements
CA2173890A1 (en) Shoe press roll for a paper machine
GB1578885A (en) Controlled deflection roll assemblies
CA2004847C (en) Support arrangement for a variable-crown roll
US4194446A (en) Rolls, such as filled calender rolls, having deflection compensation
US6036820A (en) Shoe press unit
US3362055A (en) Hydraulic anti-deflection roll
US4651552A (en) Roll for a foil-drawing calender or the like
CA2112607C (en) Shoe for an extended-nip press
EP1127187B1 (en) A press for the dewatering of a fibre web
US4319390A (en) Sag prevention means for a roller for the pressure treatment of webs of material
US4850088A (en) Self-loading controlled deflection roll
EP0147352B1 (en) Extended nip press
US5628717A (en) Roll, having controlled bending, for a calender or similar device
US4656709A (en) Floating roll capable of acting in two opposite directions
US6796929B2 (en) Self-adjusting deflection controlled roll
GB2088429A (en) Calender
US5329847A (en) Press roll having components exhibiting approximately equal gravity induced flexure

Legal Events

Date Code Title Description
AS Assignment

Owner name: VOITH SULZER PAPIERMASCHINEN GESELLSCHAFT MBH, GER

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZUEFLE, THOMAS;SCHIEL, CHRISTIAN;STEINER, KARL;REEL/FRAME:007491/0495;SIGNING DATES FROM 19950420 TO 19950425

CC Certificate of correction
REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 20010708

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362